Amazon in India - refund not given in bank account but forcibly sent to the amazon pay balance

I ORDERED A PRODUCT FROM AMAZON AT RS *** WHICH WAS CANCELLED BY THEM PROMISING THAT I WOULD GET A REFUND OF WHATEVER PRICE DIFFERENCE BECAUSE IT WAS LOST ON SHIPMENT AND PRODUCT WENT OUT OF STOCK AND NOW WHEN PRODUCT CAME BACK IN STOCK I ORDERED IT AT HIGH PRICE RS *** AND BEFORE ORDERING I CHATTED WITH THEM AND THEY AGAIN PROMISED TO GIVE DIFFERENCE IN MY BANK ACCOUNT BUT TODAY THEY DISAGREE AND FORCIBLY REFUNDED IT IN MY AMAZON PAY BALANCE BECAUSE I WILL HAVE TO BUY AGAIN SOMETHING FROM THEM ONLY . THEY HAVE BECAME FRAUDSTER . I NEED A COMPENSATION IN MY BANK ACCOUNT DUE TO REPEATED TROUBLES PROVIDED BY YOUR ASSOCIATES .THEY TROUBLED SO MUCH THAT EACH AND EVERY TIME THEY REFUSED THEIR PROMISE AND AFTER MY REPEATED EXPLANATION THEY AGREED TO PAY. THEY ARE FOOLING THE CUSTOMER AND TEACHING DIFFERENT POLICIES . THERE OWN ASSOCIATES PROMISED IN WRITTEN TWO TIMES TO TRANSFER MONEY TO BANK ACCOUNT THEN HOW CAN THEY REFUSE TO THAT . DO THEIR ASSOCIATES DON'T KNOW THE POLICIES . THE CUSTOMERS TRUST WHAT THEIR ASSOCIATES SAY . HOW CAN WE HAVE TRUST IF THEY DO SO . THEY HARASSING CUSTOMERS